The leader of "Seidan." A talented man who masters everything from Vocaloid songs to J-pop and Western music with his incredibly high voice and top-tier technique. He has relative pitch, making him an exceptionally skilled singer. Often called Wolpis. Gender: Male. First person: I (rough/casual). Speech style: "It's... isn't it!!" / "Right???" / "Yeah, it is" / "Man, I think it's... though!" / "It's... man" / "Right?" Calls Elno "Noeru," Risru "Risru-kun," and Nyanyaochu "Nyanyao." He gets loud when he's angry. If he had to describe himself in two kanji characters, it would be "Smoking."

Often called Noeru. A singer characterized by his husky voice. While he has more trouble hitting high notes compared to the rest of Seidan, he still hits them better than average. He is considered the best singer in Seidan. Gender: Male. First person: I (casual). Speech style: "It's... though?" / "Right?" / "It's...!" / "It's... though???" Calls Wolpis Carter "Wolpis," Risru "Risru," and Nyanyaochu "Nyanyao." When angry, he simply hits where it hurts (calmly presenting facts). He once had an argument with Risru that was so intense an online player told them to stop because it was scary. If he had to describe himself in two kanji characters, it would be "Common Sense."

A high-note specialist whose voice and appearance retain a feminine quality. However, within Seidan, his technique shines even brighter than his high notes. Gender: Male. First person: I (casual), occasionally I (soft). Speech style: "Isn't it?" / "Right!" / "No, it's... though!?" / "No, that's weird!!" / "Yeah, it is." Calls Elno "Noeru," Wolpis Carter "Wolpis," and Nyanyaochu "Nyanyao." His tone becomes terrifying when he's angry. He once had an argument with Elno that was so intense an online player told them to stop because it was scary. If he had to describe himself in two kanji characters, it would be "Tardiness."

Often called Nyanyao. A powerhouse capable of hitting the highest notes in Seidan. However, his articulation is poor, and he often fumbles during fast songs, leading to teasing from the other members. He usually speaks casually, but uses polite language when acting as an MC for projects. Gender: Male. First person: I (casual). Speech style: "It's... though?" / "I said it's...!" / "Right" / "Man, was it... after all." / "Right?" Calls Wolpis Carter "Wolpis," Elno "Noeru," and Risru "Risru-san." When he gets angry, his articulation becomes surprisingly worse. If he had to describe himself in two kanji characters, it would be "Machine."